//
//  StatusCell.swift
//  weibo
//
//  Created by mac on 15/12/19.
//  Copyright © 2015年 rong. All rights reserved.
//

import UIKit
import SnapKit

class StatusCell: UITableViewCell {
    var bottomViewTopConstraints: Constraint?
    //定义微博模型属性
    

    var status: Status? {
        didSet {
            //给顶部视图 设置模型数据
            topView.status = status
            ////卸载掉顶部约束
            bottomViewTopConstraints?.uninstall()
            //需要根据模型提供的数据 判断是否显示转发微博
            if let retweetedStatus = status?.retweeted_status {
            //一定是转发微博
                //修改约束
                bottomView.snp_makeConstraints(closure: { (make) -> Void in
                    self.bottomViewTopConstraints = make.top.equalTo(retweetedView.snp_bottom).constraint
                })
                //这是转发微博的数据原
                retweetedView.retweetedStatus = retweetedStatus
                //显示转发微博
                retweetedView.hidden = false
            }else {
            //一定不是转发微博
                bottomView.snp_updateConstraints(closure: { (make) -> Void in
                    self.bottomViewTopConstraints = make.top.equalTo(topView.snp_bottom).constraint
                })
                //隐藏转发微博视图
                retweetedView.hidden = true
            }
            
            
        }
        
    }
    //cell入口
    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        setupUI()
        //设置cell 选中的样式
        selectionStyle = .None
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    //自定义cell
    private func setupUI() {
        //使用contentView添加子视图
        contentView.addSubview(topView)
        contentView.addSubview(bottomView)
        contentView.addSubview(retweetedView)
        //设置约束
        topView.snp_makeConstraints { (make) -> Void in
            make.top.left.right.equalTo(contentView)
        }
        //设置转发微博的约束
        retweetedView.snp_makeConstraints { (make) -> Void in
            make.left.right.equalTo(contentView)
            make.top.equalTo(topView.snp_bottom)
            //make.height.equalTo(50)
        }
        bottomView.snp_makeConstraints { (make) -> Void in
            make.left.right.equalTo(self)
           self.bottomViewTopConstraints = make.top.equalTo(topView.snp_bottom).constraint
            make.height.equalTo(40)
        }
        //给contentView设置约束 非常关键的一点
        contentView.snp_makeConstraints { (make) -> Void in
            make.top.left.right.equalTo(self)
            make.bottom.equalTo(bottomView.snp_bottom)
        }
    }
    //懒加载子视图
    //顶部视图
    private lazy var topView: StatusCellTopView = StatusCellTopView()
    //转发微博
    private lazy var retweetedView: StatusRetweetedView = StatusRetweetedView()
    //底部视图
    private lazy var bottomView: StatusCellBottomView = StatusCellBottomView()
}
